WO2011110389A1 - Kraftstoffeinspritzsystem einer brennkraftmaschine - Google Patents
Kraftstoffeinspritzsystem einer brennkraftmaschine Download PDFInfo
- Publication number
- WO2011110389A1 WO2011110389A1 PCT/EP2011/051594 EP2011051594W WO2011110389A1 WO 2011110389 A1 WO2011110389 A1 WO 2011110389A1 EP 2011051594 W EP2011051594 W EP 2011051594W WO 2011110389 A1 WO2011110389 A1 WO 2011110389A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pump
- pressure
- fuel injection
- injection system
- internal combustion
- Prior art date
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
- F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
- F02D33/006—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge depending on engine operating conditions, e.g. start, stop or ambient conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
- F02D41/3854—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped with elements in the low pressure part, e.g. low pressure pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/02—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements
- F02M41/06—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/12—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps having other positive-displacement pumping elements, e.g. rotary
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/38—Pumps characterised by adaptations to special uses or conditions
- F02M59/42—Pumps characterised by adaptations to special uses or conditions for starting of engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/0265—Pumps feeding common rails
- F02M63/027—More than one high pressure pump feeding a single common rail
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines
- F02M69/34—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines with an auxiliary fuel circuit supplying fuel to the engine, e.g. with the fuel pump outlet being directly connected to injection nozzles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines
- F02M69/36—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages
- F02M69/42—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages using other means than variable fluid pressure, e.g. acting on the fuel metering device mechanically or electrically
Definitions
- the invention relates to a fuel injection system of an internal combustion engine having a prefeed pump and a downstream high-pressure pump, which is connected to a high pressure accumulator and wherein the high pressure accumulator is operatively connected to at least one fuel injector.
- Such a fuel injection system is known from DE 10 2004 018 843 A1.
- This fuel injection system is designed as a common-rail injection system.
- the pressure in the high-pressure accumulator (rail) may decrease to such an extent that for a subsequent start of the internal combustion engine, there is no sufficiently high fuel pressure available for injecting fuel by means of a fuel injector the associated combustion chamber of the internal combustion engine would be required.
- the fuel injection system has an electronic control module, which has a Vorphilllalgorithmus.
- the prefill algorithm operates to activate an electrically driven pump when the high pressure accumulator is in a non-prefilled state.
- the electronic control module is in communication with at least one sensor that can determine the state of the fuel injection system.
- a disadvantage of this system is that in any case, until a start of the internal combustion engine, a not insignificant period of time passes, which is necessary in order to build up the necessary fuel pressure.
- the construction cost of the system is high.
- the invention is based on the object to provide a fuel injection system and to provide a method for operating such a fuel system, which avoids the known disadvantages and allows a quick start of the internal combustion engine. This should be done with a low construction cost.
- the prefeed pump is designed for the generation of a delivery pressure with which at least in a defined operating state of the internal combustion engine, a fuel injection by means of the fuel injector.
- the defined operating state is in particular the starting process of the internal combustion engine.
- a corresponding method for operating the fuel injection system provides that the prefeed pump is operated until a completed engine start in a start operating mode and is operated after the successful engine start in a pre-conveyor operating mode.
- An essential idea of the present invention is not to use additional pumps or control modules, which are used solely for the start of the internal combustion engine, but to design components required for the normal operation of the internal combustion engine in such a way that they enable a quick start of the internal combustion engine.
- the present invention is based on the recognition that it is sufficient for a successful engine start when a fuel pressure is available in the starting phase, the minimum opening pressure of the
- Fuel! corresponds to the ejector. It should be remembered that today is common
- Fuel injectors for corresponding fuel injection systems have no fixed opening pressure, but rather the opening and closing of the fuel injector of a control unit, which otherwise dominates the entire system, is caused.
- the minimum opening pressure on the one hand describes the delivery pressure which can be represented by the prefeed pump, but on the other hand must be so high that a fuel injection into the working space of the internal combustion engine takes place against the pressure of the compressed combustion air there. With the attainment of such a fuel pressure, fuel can be reliably injected from the fuel injector into the corresponding working chamber of the internal combustion engine and the start of the internal combustion engine brought about.
- the prefeed pump is designed so that it generates a front pressure of about 80-120 bar.
- this pressure has to be generated only for a short time, it is not necessary to design the prefeed pump so that it can generate such a delivery pressure continuously and permanently. Rather, it is perfectly sufficient to design the startup mode of operation as the overload mode of operation, which is to be provided only for a short time.
- the prefeed pump is a gear pump.
- this gear pump as is provided in a further embodiment, is electrically operated, such a start operating mode is easy to implement by the prefeed pump is operated with a higher electrical power.
- the prefeed pump is then operated in a prefeed operating mode in a further embodiment of the invention, in which case the delivery pressure is up to 8 bar.
- the delivery pressure is up to 8 bar.
- Such an approximately 15-fold overload can be realized in the short term without disadvantages with regard to the durability of a gear pump operated in this way with the electrically driven gear pump shown.
- other suitable prefeed pumps can be used within the scope of the invention.
- a high pressure pump work space of the high pressure pump is connected to a suction valve and a check valve.
- the suction valve is connected to the prefeed pump via a metering unit, while the check valve is connected directly to the high-pressure accumulator.
- High-pressure pump operated during the start of the engine only with a low starting speed. At such a low starting speed but also the pressure losses, resulting for example on the bearings of the drive shaft of the high-pressure pump, low.
- the bearings intentionally remove a small amount of fuel. leads to ensure lubrication of the bearing and / or venting of the high-pressure pump.
- Figure 1 shows the circuit design of the fuel injection system according to the invention
- Figure 2 is a diagram for pressure control of the fuel injection system.
- the fuel injection system according to FIG. 1 has a prefeed pump 1, which is designed as a gear pump.
- the prefeed pump 1 is operated by an electric motor 2 and the prefeed pump 1 sucks fuel, in particular diesel fuel from a tank 3, possibly with the involvement of a filter device.
- the funded by the feed pump 1 fuel is supplied via a normally electrically operated metering unit 4 and a suction valve 5 to the high-pressure working chamber 6 of a high-pressure pump 7.
- the high-pressure working chamber 6 is further connected via a check valve 8 with a high-pressure accumulator 9.
- the high-pressure accumulator 9 is in turn connected via high-pressure lines with fuel injectors 10 corresponding to the number of cylinder units of the internal combustion engine.
- the metering unit 4 controls in normal operation, the high pressure pump 7 supplied amount of fuel in dependence on the pressure prevailing in the high-pressure accumulator 9 fuel pressure.
- the metering unit 4 is switched so that its control panel is open, that is, the entire amount of fuel delivered by the prefeed pump 1 of the high-pressure pump 7 is supplied.
- the suction valve 5 is configured such that during the pumping operation of the high-pressure pump, the fuel located in the high-pressure working space 6 can not get back into the line to the metering unit 4.
- the high Pressure pump has one or more pump piston 1 1, which is moved up and down by a drive shaft in one or more pump cylinder (s) 12 and the introduced during a suction stroke in the Hochdruckpum- penarbeitsraum 6 fuel via the check valve 8 in the high-pressure accumulator 9 promotes.
- the fuel pressure over the time axis generated by the fuel injection system is shown in the upper part, and in the lower part also an injection through the fuel injectors, also along the time axis.
- the parabolic curve 13 represents the delivery pressure that can be represented by the prefeed pump 1 in the start operating mode, wherein a delivery pressure of 80-120 bar is achieved in the region of the parabolic tip.
- the delivery pressure is controlled from the parabolic curve 13 in a control range 14 so that the delivery pressure can be maintained over a corresponding period of time at the level of 120 bar, then then according to the dashed curve 13a to the prefeed pressure in the range of 1-8 bar to be reset.
- the pressure rise 15 generated by the high-pressure pump 7 is shown in the diagram, which is generated after starting the internal combustion engine.
- the first injection 16 initiated by a control unit controlling the entire system takes place at the point in time in which a delivery pressure of 120 bar is achieved by the prefeed pump 1 in accordance with the parabolic curve 13.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012556426A JP2013522514A (ja) | 2010-03-12 | 2011-02-03 | 内燃機関の燃料噴射システム |
US13/577,973 US9328708B2 (en) | 2010-03-12 | 2011-02-03 | Fuel injection system of an internal combustion engine |
BR112012022866A BR112012022866A2 (pt) | 2010-03-12 | 2011-02-03 | sistema de injeção de combustível em motor de combustão |
RU2012143480/06A RU2012143480A (ru) | 2010-03-12 | 2011-02-03 | Система впрыскивания топлива в двигатель внутреннего сгорания |
CN2011800135520A CN102792007A (zh) | 2010-03-12 | 2011-02-03 | 内燃机的燃料喷射系统 |
EP11702981.9A EP2545268B1 (de) | 2010-03-12 | 2011-02-03 | Kraftstoffeinspritzsystem einer brennkraftmaschine |
KR1020127023727A KR20130016218A (ko) | 2010-03-12 | 2011-02-03 | 내연기관의 연료 분사 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010002801A DE102010002801A1 (de) | 2010-03-12 | 2010-03-12 | Kraftstoffeinspritzsystem einer Brennkraftmaschine |
DE102010002801.0 | 2010-03-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011110389A1 true WO2011110389A1 (de) | 2011-09-15 |
Family
ID=43857664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2011/051594 WO2011110389A1 (de) | 2010-03-12 | 2011-02-03 | Kraftstoffeinspritzsystem einer brennkraftmaschine |
Country Status (9)
Country | Link |
---|---|
US (1) | US9328708B2 (de) |
EP (1) | EP2545268B1 (de) |
JP (1) | JP2013522514A (de) |
KR (1) | KR20130016218A (de) |
CN (1) | CN102792007A (de) |
BR (1) | BR112012022866A2 (de) |
DE (1) | DE102010002801A1 (de) |
RU (1) | RU2012143480A (de) |
WO (1) | WO2011110389A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012059268A1 (de) * | 2010-11-03 | 2012-05-10 | Robert Bosch Gmbh | Kraftstoffeinspritzsystem sowie verfahren zur befüllung und/oder entlüftung eines kraftstoffeinspritzsystems |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102010064165A1 (de) * | 2010-12-27 | 2012-06-28 | Robert Bosch Gmbh | Kraftstoffversorgungssystem einer Brennkraftmaschine mit Kraftstoffdirekteinspritzung |
DE102012212062A1 (de) * | 2012-07-11 | 2014-01-16 | Robert Bosch Gmbh | Niederdruckkreislauf für ein Kraftstoffeinspritzsystem, Kraftstoffeinspritzsystem sowie Verfahren zum Betreiben eines Kraftstoffeinspritzsystems |
DE102015203348B3 (de) * | 2015-02-25 | 2016-02-18 | Ford Global Technologies, Llc | Verfahren zum Betrieb einer Common-Rail-Einspritzanordnung für eine Brennkraftmaschine mit Stopp-Start-System |
JP6387905B2 (ja) * | 2015-06-10 | 2018-09-12 | 株式会社デンソー | ガソリン燃料供給システム |
DE102017221293A1 (de) * | 2017-11-28 | 2019-05-29 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Kraftstoffzumesssystems |
US20190368449A1 (en) * | 2018-06-01 | 2019-12-05 | GM Global Technology Operations LLC | Returnless fuel system with accumulator |
DE102018216176A1 (de) * | 2018-09-21 | 2020-03-26 | Robert Bosch Gmbh | Kraftstofffördereinrichtung für eine Brennkraftmaschine |
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2011
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- 2011-02-03 KR KR1020127023727A patent/KR20130016218A/ko not_active Application Discontinuation
- 2011-02-03 JP JP2012556426A patent/JP2013522514A/ja active Pending
- 2011-02-03 BR BR112012022866A patent/BR112012022866A2/pt not_active IP Right Cessation
- 2011-02-03 RU RU2012143480/06A patent/RU2012143480A/ru not_active Application Discontinuation
- 2011-02-03 WO PCT/EP2011/051594 patent/WO2011110389A1/de active Application Filing
- 2011-02-03 EP EP11702981.9A patent/EP2545268B1/de not_active Not-in-force
- 2011-02-03 CN CN2011800135520A patent/CN102792007A/zh active Pending
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WO2012059268A1 (de) * | 2010-11-03 | 2012-05-10 | Robert Bosch Gmbh | Kraftstoffeinspritzsystem sowie verfahren zur befüllung und/oder entlüftung eines kraftstoffeinspritzsystems |
Also Published As
Publication number | Publication date |
---|---|
US9328708B2 (en) | 2016-05-03 |
DE102010002801A1 (de) | 2011-09-15 |
RU2012143480A (ru) | 2014-04-27 |
EP2545268A1 (de) | 2013-01-16 |
EP2545268B1 (de) | 2014-11-12 |
CN102792007A (zh) | 2012-11-21 |
US20120325173A1 (en) | 2012-12-27 |
JP2013522514A (ja) | 2013-06-13 |
KR20130016218A (ko) | 2013-02-14 |
BR112012022866A2 (pt) | 2018-06-05 |
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